<!DOCTYPE html>
<html lang="en">
<head>
	<meta charset="UTF-8">
	<title>Document</title>
	<style type="text/css">
		h1 em{
			color:red;
		}
		p em{
			color:green;
		}
	</style>
</head>

<body>
	<h1>This is a <em>important</em> heading</h1>
	<p>This is a <em>important</em> paragraph.</p>
</body>
</html>